Literaturdatenbank
Literaturdatenbank |
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Germano, D. J., Bury, R. B., & Jennings, M. (2000). Growth and population structure of emydoidea blandingii from western nebraska. Chelonian Conservation and Biology, 3(4), 618–625.
Added by: Admin (17 Aug 2008 18:54:46 UTC) Last edited by: Beate Pfau (07 Feb 2009 07:00:04 UTC) |
| Resource type: Journal Article BibTeX citation key: Germano2000b View all bibliographic details  |
Categories: General Keywords: Emydidae, Emydoidea, Emydoidea blandingii, Habitat = habitat, Nordamerika = North America, Schildkröten = turtles + tortoises Creators: Bury, Germano, Jennings Collection: Chelonian Conservation and Biology |
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| Abstract |
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We studied a population of Blanding's turtles (Emydoidea blandingii) at Valentine National Wildlife Refuge, Nebraska, at the western edge of the species' range. In 1991, we captured or found 80 turtles (22 females, 24 males, and 34 that were juveniles or which we could not determine sex). We determined individual ages using scute annuli, where possible. Ages were from 1-16+ yrs; most (73.8%) were16 yrs. The mean carapace length (CL) of adult males was 203.7 mm (range, 174-232 mm) and of adult females, 186.1 mm (range, 162-213 mm). Mean mass of adult males was 1174 g (range, 750-1680 g) and of adult females, 911 g (range, 630-1380 g). Growth of males and females was not significantly different through the first 13 years for mass, but differed significantly in CL by age 11. Both sexes reached significantly different asymptotic carapace lengths and masses. Turtles grew faster in their first and second years of life than in years 3-12. Growth of hatchlings was faster at this study site than that reported elsewhere. Longevity, as estimated by the age at which CL was 0.1 mm of asymptotic CL, was 40.5 yrs for males and 41.2 yrs for females. We trapped many juveniles (50% <10 yrs old) but few small turtles (3% <100 mm CL).
Added by: Admin Last edited by: Beate Pfau |